Smoker&#39;s pipe



P. M. HALL SMOKER S PIPE March 30, 1937.

Filed Nov. 18

I.. A... ,1.1 a A Patented Mar. 30, 1937 f Y UNITED STATES PATENT OFFICEA `SlWOKERVS PIPE Preston M. Hall, Worcester, Mass.

Application November 18, 1933, Serial No. 698,661

2 Claims.

This invention relates to pipes for use by smokers of tobacco.

It is the general object of my invention to provide a pipe for such purposes which is formed from a novel and improved composition in which tobacco enters as an important constituent.

More specifically, my invention relates to a pipe made of tobacco combined with a natural or synthetic resin to form a hard and strong material particularly adapted for its intended purpose.

My invention further relates to arrangements and combinations of parts which Will be hereinp after described and.' more particularly pointed 1D out in the appended claims.

A preferred form of the invention is shown in the drawing, in which Fig. 1 is a side elevation of a pipe embodying my invention;

Fig. 2 is a partial sectional side elevation thereof, and

Fig. 3 is a plan View of a mold in which my improved pipe may be formed.

Referring to the drawing, I have shown a 25 pipe comprising a bowl III, a stem portion II, a

mouthpiece I2 and a band I3. The bowl is provided with the usual recess I4 to receive the tobacco, and the stem II and mouthpiece I2 are provided with an air passage I5, as usual in such 30 constructions.

The band I3 may be of substantial width and overlaps the reduced abutting end portions of the stem II and mouthpiece I2.

It will be understood that my invention may 35 be embodied in many shapes and styles of pipes,

and that the representation of a pipe in the drawing of this application is illustrative only.

In constructing my improved pipe, I take 40 tobacco which has been thoroughly dried and reduce the same to the form of small fragments or grains. I nd it particularly desirable to use tobacco stems in the manufacture of my improved pipe, as these stems contain less nicotine than 45 the ordinary tobacco and also contain very little, if any, of the sweetening or molasses-like 'substance found in other parts of the leaf. The stems are also largely a waste product, and use of the stems correspondingly reduces the cost of 50 manufacture.

I mst Jhmnmglfily mix the grains or fragments of tobacco with a natural or synthetic resin in a liquid state and preferably containing approximately sixty percent of volatile matter. I then 55 place the material in an oven where it is dried at relatively low heat, preferably not substantially exceeding 175 F.

After being thus dried, the tobacco grains are easily separated and are found to be coated with the resinous material, and a considerable quantity of this resinous material may be absorbed by the grains.

Having prepared the tobacco grains as above described, I fill a suitable mold with the grains and thereafter apply a heavy pressure thereto, following which I heat the mold and material to about 300 F., at which heat the resinous material rst melts and then lls all the recesses of the mold and the spaces between the grains of tobacco.

The next effect of the heat and pressure is to polymerize the resinous material which, after cooling, is found to be very hard and strong. After this process is complete, the pipe may be easily removed from the mold, as the material tends to shrink slightly during the heating process.

The pressure used may vary within rather wide limits but a pressure of fifteen hundred to five thousand pounds per square inch will usually be found satisfactory. The proportions of tobacco and resinous material may also be varied, but a ratio of onepart of tobacco to one part of liquid resinous material is recommended.

If difficulty is encountered by the sticking of the material to the molds, a small amount of some such lubricating substance as stearic acid may be added to prevent such sticking. Usually one percent of stearic acid will be suflicient.

In certain cases and for certain types of pipes it may also be advisable to add a small proportion, possibly five to seven percent, of some brous material to the mixture to increase the strength thereof. Short cotton or linen fibers are suitable for this purpose.

In Fig. 3, I have shown a portion of a mold in which my imp-roved pipe may be produced. This mold comprises a block 20 having a recess 2| therein and having a core 22 for the bowl and a second core 23 for the air passage.

The molds are so constructed that the cores may be removed with the pipe and afterwards withdrawn therefrom, or they may be withdrawn from the mold before the pipe is removed therefrom. The upper part of the mold and the means for applying pressure thereto are not shown in the drawing but may be of any usual construction.

A pipe constructed as above described is found to be particularly well adapted for its intended 2S L 2,075,281 Y uses, the embodiment of the grains of tobacco in Y Ythe pipe produce an attractive appearance, and

the article may be economically manufactured, largely from what is at present waste material.

5 The pipe requires less breaking-in than theordinary pipe and gives what smokers term a sweet smoke.

In the claims the'term resin is to be unders stood as including both natural and synthetic 110 resins. i

Having thus described my invention andthe advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim iszbowl formed of a compressed mixture of thorough- Y1. As an article of manufacture, a smokers pipe ly dried tobacco and a synthetic resin, vsaid mixture having the characteristics of becoming a hardened strong substance under pressure limits between 1500 and 5000 pounds per'square inch when said material is at a temperature of about 5Y between 1500'and 5000 pounds per square inch when said material is at a temperature of about 300 F. and said mixture consisting of approxi` "mately one part ofV tobacco'to synthetic resin. f

PRESTON M. HALL.

one part of the 15 

